Honeywell RTH3100C Operating Manual page 8

T h e SYSTEM s w itc h c a n b e s e t to c o n tro l
y o u r h e a tin g o r c o o lin g s y s te m , d e p e n d in g
on th e s e a s o n .
• C o o l: C o o lin g s y s te m c o n tro l.
• O ff: All s y s te m s a re off.
• H e a t: H e a tin g s y s te m c o n tro l.
• E m H e a t: E m e rg e n c y & A u x ilia ry H e a t
c o n tro l. C o m p re s s o r is lo c k e d o u t.
CAUTION: EQUIPMENT DAMAGE
HAZARD. Do not operate cooling
system when outdoor temperature
is below 50°F (10°C).
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RTH3100C